severance



L. M. SEVERANCE.

Platform Scales.

Patented Aug 6, 1 867.

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LYMAN M. SEVERANCE, OF DIXON, ILLINOIS.

Letters Patent No. 67,596, dated August 6, 1867.

IMPROVEMENT IN PLATFORM-SGALES.

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TO ALL WHOM IT ,MAY CONCERN:

e Be it known that I, LYMAN M. SEVERANCE, of Dixon, in the oounty of Lee, aud` State of Illiuois, have invented a new and useful Improvement in Platform-Scales; and I do hereby declare and make known that the following is a full, clear, and exact description thereof, reference being had to the accompanyiug drawings, and the letters and figures marked thercon, which form part of this specification.

' To ena-ble those skilled in the art to understand how to construct and use my invention, I will proceed to deseribe its construction and operation with partieularity, making reference, in so doing, to the aforesaid drawings, in which- Figura 1 represents u plan view of the system of levers beneat-h the platform, which is removed.

Figure 2 is a side view of the same seen from the rear, and

Figur-e 3 is a similar'view seen from the front.

In said drawiugs the same letters of reference rcpresent the .same parts of my invention in the several figures. I

A represents the frame and enclos ure within which the levers and superincumhent platform are arranged B represeuts two heavy cross-timbers, arranged at each end of the franc, which rest upon the levers D E, as hereinafter described, upon which the longitudinal beams C are securcd, the platfmn being arranged upomthe said sleepe's C C, and thus resting upon the ui'oresaid levers I) E. These lcvcrs, as shown in the drawings, are arranged in pairs, one pair being longer than the other, extending from the four corners of the frame and platform to a point hack of the platform and midway from each end, where they are connected with the red F, which is attached at its upper end to the scale-hean G. These four lcrers are each Secured to the said rod F by separate links or connections Z, as shown in fig. I?, so that each lover acts upon said rod and scale-beam, wholly independent of and u-nimpeded bythe others. The ends of the levcrs D D, at the corners of the platform, are attached to the rigid framework of the apparatus by a staple and clevis arrangement, :s shown in the drawings at a I),

while the like ends of the levers E are similarly attached to the immovable frame, as shown in the drawings at m. The platform is Suspended upon the lcvers D by means of staple and elevis eonnections, as shown c d,-the staples being attached to the aforesaid cross-timbers B, and upon the levers E at the points n, by a similar arrangemeut, as shown in fig. 2.

Although I regard the specific modes herein described of eonnecting the levers to the frame, the platform, and the rod F as being very superior in point of praeticability, still said conneetions may he made in any other suitable manner.

The points c 'and n, where the platform rests upon said levers D E, are taken in such manuer as that the proportion between the respective arms shall be as follows: The length of the am Zc is to the length of 'the arm a c iu the lever D as the length of the arm lat is to the length of the arm m n in the levers E, so that a given weight upon the platform shall act uniformly at the point Zupon all the four levers, and with same e''ect upon the scale-beam.

By this arrzugement of the levers they can be arrangcd heneath the platform-in a small space, so as to rendor it wholly unuecessary to eonstruet a pit beneath to contain the' levers or system of levers, which is required with other kinda of Scales, the surface of the platform not being neeessaril more than about fifteeu nches above the level of the ground, so that teams can easily be driven upon the platform by simply arranging inclines at each end.

Having described the constructio: and operation of my nvention, I will specify what I claim, and desire to secure by Letters Patcnt:

I claim the combination of the four levers D D E E, when arranged with respect to the platform and its permanent frame and the rod F, substantiallr in the manner and for the purposes hereiu specified.

LYMAN M. SEVERANCE.

witnesses: WILLIAM J. CARPENTER; -JEROME W. HOLLINBECK; 

